128 
Y. TANAKA. 
speaks for the correctness of that view. 
b) The striped yellows of the Lot S. 5. ’ll, which were heterozygous 
as regards both the marking (striped and plain) and the colour characters 
(yellow and white), were mated among themselves. One of the batches in 
this lot was reared, which gave the following result: 
Lot No. 
S. 5. ’ll 
Striped yellow 
134 
Striped white 
10 
Plain yellow 
7 
Plain white 
43 
Total 194 
The above figures widely differ from those calculated on the normal ratio 
9 : 3 : 3 : 1 which is shown below : 
Striped yellow 
109.1 
Striped white 
36.4 
Plain yellow 
36.4 
Plain white 
12.1 
If we assume, on the contrary, the occurrence of a partial coupling of 
striped marking with yellow colour on the 7 : 1 system, the result can be 
at once accounted for thus : 
Actual figures 
Expectation < 
7 : 1 basis 
Striped yellow 
134 
134.1 
Striped white 
10 
11.4 
Plain yellow 
7 
11.4 
Plain white 
43 
37.1 
Total 
194 
194.0 
As the above table shows, the observed numbers are very close to the 
